Heating-drum.



so MODEL.-

PATENTED JULY 19, 1904,

R. GQDOENITZ.

I HEATING DRUM. APPLICATION. FILED APR.Z]L, 1 904.

Y luvanloz,

' UNITED STATES Patented July 19, 1904.

PATENT @EETQE.

HEATING-DRUM.

SPECIFICATION forming part of Letters Patent No. 765,416, dated July 19, 1904:.

Application filed April 21, 1904..

T 0 all whom, it nubg concern.-

Be it known that I, RErNHoLD O. DOENITZ, a citizen of the United States, residing at Iron River, in the county of Iron and State of Michigan, have invented a new and useful Heating-Drum, of which the following is a specification.

My invention relates to heating-drums, and more particularly to portable heating-drums or those provided with connections for a line of smoke pipe or flue.

The object of my invention is to provide an improved drum for heating and ventilating a chamber, causing a circulation of air therein by drawing out the cold and impure air near the floor and supplying its place by fresh heated air introduced above:

It is also my object 'to provide adrum having a series of exhaust-passages adapted to draw out through the drum the upper strata of heated air to ventilate as well as to cool the chamber when desired, also to provide means for cooling off the drum when the chamber is overheated.

In the accompanying drawings, forming a part of this specification, Figure 1 is a front elevation of my drum. Fig. 2 is a vertical section of the same, and Fig. 3 is a crosssection taken on the line 3 3 of Fig. 1.

Referring more particularly to the drawings,A denotes theheating-drum, having valvecontrolled openings at for supplying hot air to the chamber, and B denotes a vertical smoke pipe or flue passing centrally through the drum, having projecting ends 7) Z) for connection in a line of pipe. I) 6 denote deflectors secured to said pipe upon opposite sides and spaced apart, as shown in Fig. 2.

C denotes an air-flue secured to the drum and communicating therewith through an opening in the top of the drum, which is controlled by a damper 0. The lower end of said line is provided-with a collar 0. Upon said collar fits a pipe D, which extends downwardly below the drum and is provided with a hood (Z, having air ports controlled by slidevalve d.

E denotes a pipe leading into the lower part of the drum, passing through the pipe D and Serial No. 204,208. 4N0 model.)

hood cl, as shown in Fig. 2, and extending to the outside air. It is provided with a valve 0 to regulate the supply of cold air.

F denotes a series of four or more upwardlyinclined ventilating-fines passing through the upper portion of the drum and leading to the smoke-pipe, into which they open. f denotes valves for said inclined pipes, which control communication to the air of the chamber. it denotes a hood surrounding the drum immediately above the ventilating-fines.

My heating and ventilating drum is designed to be connected in a line of smoke-pipe, the projecting ends 6 Z) of the smoke-fine serving to make joint. The pipe D, which forms a continuation of the flue C, extends, preferably, to the floor 0f the chamber and when the valve cl isopen conducts the cold and impure air from the region of the floor to the smokepipe above the drum. To take the place of this cold air heated air is supplied from the drum through openings (0. The drum is supplied continually by fresh air from the outside, which passes through the pipe E into the lower part of the drum, whence it passes back and forth by means of deflectors Z) around the smoke pipe or flue and is thoroughly heated before escapingthrough openings a. A moderate circulation of air is thus kept up, the cold air being taken up from the floor and passed through the smokepipe, while its place is constantly supplied by fresh heated air from the outside, passing through the openings (0. When it is desired to give a more rapid ventilation, the valves f of the ventilating-fines are opened, while the coldair valve 0 is preferably shut off, the effect being-to draw the air from the room through the pipes F, whiclrfrom their position in top of drum are heated and cause a rapid indraft of air from the room, which passes up the smoke-pipe. The hood it serves to disseminate the heated air through the chamber, which arises from the sides of the drum. This hood also serves when the valves f are open to arrest the ascent of such air and deflect it through the pipes F. When it is desired to cool the drum, the dampers 0 and e are opened, allowing the escape of the heated air up the smoke-pipe. Opening both of these dampers, moreover, establishes at once a current of air from the outside through the drum, which cools it rapidly. The slide-valve a should be closed While the drum is being cooled.

Having thus shown and described my invention, What I claim, and desire to secure by Letters Patent, is i 1. A heating-drum having a smoke-flue leading therethrough adapted for connection in a line of smoke-pipe, an air-inlet arranged in the bottom of said drum and valve-controlled Warm-air outlets arranged near its top, and an independent air-flue exterior of the drum entering said smoke-flue above the drum and this specification in presence of two witnesses.

REINHOLD o. DOENITZ.

Witnesses:

P. OBRIEN, JAMES LENHARD. 

